Converting degrees and radians.

1. Is there a quot;naturalquot;
way to measure
angles in a circle?
Spider & web, Ugley Green, Essex by flickr user hungrybrowser

5. 1 RADIAN

6. CONVERTING DEGREES AND RADIANS
R
D
=
π
180°
D is an angle in degrees R is an angle in radians

7. Convert 20° into radians.

8. Convert 25° into radians.

9. Convert radians into degrees.

11. A bicycle wheel has a diameter of 0.4 meters. A point on the outer
rim travelled 2.6 m. How many degrees has the wheel turned?

12. HOMEWORK